[rules-users] typical rules application

Hi I am just trying to get a feel of size of a typical rules application. How many low-to-medium complex rules a typical rules application will have ? I understand and agree that it totally depends upon the application and business needs, but I am trying to get a feel of if rules is the correct solution to a problem and if that can be determined by number of rules. e.g. if to satisfy a business need, I wrote a rules application and ended up writing say 20 medium-complex rules and in another case, I wrote a rules application and ended up writing say 10,000 low/medium complex rules which one of these two cases sound like real, logical candidate for a rules based app and why ? Is there a rule of thumb, that "x" number of rules is a good number for an application to qualify under rules technology ? -abhay